 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal.navigator.workingsets;

 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.StructuredViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jface.viewers.ViewerSorter;

 /**
  * @since 3.2
  *
  */
 public class WorkingSetSorter extends ViewerSorter {
   
     public int compare(Viewer viewer, Object e1, Object e2) {
         if(viewer instanceof StructuredViewer) {
              ILabelProvider labelProvider = (ILabelProvider) ((StructuredViewer)viewer).getLabelProvider();
              String text1 = labelProvider.getText(e1);
              String text2 = labelProvider.getText(e2);
              if(text1 != null) {
                  return text1.compareTo(text2);
              }
         }
         return -1;
     }

 }

